package com.mmdccj.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.mmdccj.reggie.common.CustomException;
import com.mmdccj.reggie.dto.SetmealDto;
import com.mmdccj.reggie.entity.Setmeal;
import com.mmdccj.reggie.entity.SetmealDish;
import com.mmdccj.reggie.mapper.SetmealMapper;
import com.mmdccj.reggie.service.SetmealDishService;
import com.mmdccj.reggie.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {
    @Autowired
    private SetmealDishService setmealDishService;
    @Autowired
    private SetmealService setmealService;
    @Override
    @Transactional
    public void saveWithDish(SetmealDto setmealDto) {
        //保存套餐的基本信息，操作setmeal，执行insert操作
        this.save(setmealDto);

        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes.stream().map((item) -> {
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());

        //保存套餐和菜品的关联信息，操作setmeal_dish,执行insert操作
        setmealDishService.saveBatch(setmealDishes);
    }

    @Override
    @Transactional
    public void removeWithDish(List<Long> ids) {
        //查询套餐状态，确定是否可用删除
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.in(Setmeal::getId, ids);
        queryWrapper.eq(Setmeal::getStatus, 1);

        int count = this.count(queryWrapper);
        if (count > 0) {
            //如果不能删除，抛出一个业务异常
            throw new CustomException("套餐正在售卖中，不能删除");
        }

        //如果可以删除，先删除套餐表中的数据---setmeal
        this.removeByIds(ids);

        //delete from setmeal_dish where setmeal_id in (1,2,3)
        LambdaUpdateWrapper<SetmealDish> lambdaUpdateWrapper = new LambdaUpdateWrapper<>();
        lambdaUpdateWrapper.in(SetmealDish::getSetmealId, ids);
        //删除关系表中的数据----setmeal_dish
        setmealDishService.remove(lambdaUpdateWrapper);
    }
    @Override
    public void updateSetmeal(long id,int status){
        LambdaUpdateWrapper<Setmeal> lambdaUpdateWrapper = new LambdaUpdateWrapper<>();
        lambdaUpdateWrapper.eq(Setmeal::getId,id);
        Setmeal setmeal = setmealService.getById(id);
        setmeal.setStatus(status);
        setmealService.update(setmeal,lambdaUpdateWrapper);
    }

    @Override
    public SetmealDto setmealDishByid(long id) {
        Setmeal setmeal = this.getById(id);
        SetmealDto setmealDto = new SetmealDto();
        BeanUtils.copyProperties(setmeal,setmealDto);

        LambdaQueryWrapper<SetmealDish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(SetmealDish::getSetmealId,id);

        List<SetmealDish> setmealDishes = setmealDishService.list(lambdaQueryWrapper);
        setmealDto.setSetmealDishes(setmealDishes);
        return setmealDto;
    }

    @Override
    public void updateSetmealDish(SetmealDto setmealDto) {
        this.updateById(setmealDto);

        Long setmealId = setmealDto.getId();

        LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper<>();

        queryWrapper.eq(SetmealDish::getSetmealId,setmealId);
        setmealDishService.remove(queryWrapper);

        List<SetmealDish> list = setmealDto.getSetmealDishes();

        list = list.stream().map((item) ->{
            item.setSetmealId(setmealId);
            return item;
        }).collect(Collectors.toList());

        setmealDishService.saveBatch(list);
    }
}



